Bizarre Beasts

Bizarre Beasts picks one strange animal a month and asks what makes it so odd, which turns out to be a great way to learn how evolution and ecology work. Hosts Hank Green and Sarah Suta keep it warm and nerdy, and each episode runs long enough to go beyond trivia. Start with The Only Octopus With a Shell, an 11-minute episode on the argonaut, also called the paper nautilus. It is the kind of animal you will want to tell someone about right away.